CCNA curriculum is changing and I'm on the old one

I've just started CCNA 3. I have until the end of October to do CCNA 3 and 4. Alongside this I am doing other qualifications. I've been told that the old CCNA curriculum (which I am on) expires in November.

I must either try and complete CCNA 3 and 4 before November and take the CCNA exam, or I'll have to do the new curriculum's exam (for which I am not studying).

How different is the new curriculum? I believe it is Exploration and Discovery. I know IGRP has been removed. What has been added? Will I be able to do it without doing its course as well?